According to my file server's HWMonitor, it idles at 24-27 degrees on each of the 6 cores. That's with the CM Hyper 212 EVO with stock fan plus a CM Sickleflow fan I bought for £5. I'll probably replace the stock fan with another one of these, and I'm gonna start overclocking this weekend as it's coming with me to a LAN PARTAAAAAAY!